Application of quick-release nitrogen fertilizer increased buffalograss divot recovery. A quick-release fertilizer at 1 lb N/1,000 ft2 resulted in 50% divot recovery 6.3 days quicker compared to the untreated control

Alderman, E.

Fry, J.

Hoyle, J.

Keeley, S.

English

Application of quick-release nitrogen fertilizer increased buffalograss divot recovery. A quick-release fertilizer at 1 lb N/1,000 ft2resulted in 50% divot recovery 6.3 days quicker compared to the untreated control

Kansas State University

Kansas Agricultural Experiment Station Research Reports Volume 1 Issue 6 Turfgrass Research Article 8 January 2015 Influence of Fertilizer Source and Rate on Buffalograss Divot Recovery E. Alderman Kansas State University, ejalderman@ksu.edu J. Hoyle Kansas State University, jahoyle@ksu.edu J. Fry Kansas State University, jfry@ksu.edu See next page for additional authors This report is brought to you for free and open access by New Prairie Press. It has been accepted for inclusion in Kansas Agricultural Experiment Station Research Reports by an authorized administrator of New Prairie Press. Copyright January 2015 Kansas State University Agricultural Experiment Station and Cooperative Extension Service. Contents of this publication may be freely reproduced for educational purposes. All other rights reserved. Brand names appearing in this publication are for product identification purposes only. No endorsement is intended, nor is criticism implied of similar products not mentioned. K-State Research and Extension is an equal opportunity provider and employer. Follow this and additional works at: https://newprairiepress.org/kaesrr  Part of the Horticulture Commons Recommended Citation Alderman, E.; Hoyle, J.; Fry, J.; and Keeley, S. (2015) "Influence of Fertilizer Source and Rate on Buffalograss Divot Recovery," Kansas Agricultural Experiment Station Research Reports: Vol. 1: Iss. 6. https://doi.org/10.4148/2378-5977.1096 Influence of Fertilizer Source and Rate on Buffalograss Divot Recovery Abstract Application of quick-release nitrogen fertilizer increased buffalograss divot recovery. A quick-release fertilizer at 1 lb N/1,000 ft2 resulted in 50% divot recovery 6.3 days quicker compared to the untreated control. Keywords turfgrass, fertilizer source, fertilizer rate, buffalograss, divot recovery, quick-release fertilizer Creative Commons License This work is licensed under a Creative Commons Attribution 4.0 License. Authors E. Alderman, J. Hoyle, J. Fry, and S. Keeley This research report is available in Kansas Agricultural Experiment Station Research Reports: https://newprairiepress.org/kaesrr/vol1/iss6/8 Kansas State University  Agricultural Experiment Station  and Cooperative Extension ServiceK-State Research and Extension is an equal opportunity provider and employer.Turfgrass Research  2015View all turfgrass research reports online at: http://newprairiepress.org/kaesrrJuly 2015Influence of Fertilizer Source and Rate  on Buffalograss Divot RecoveryEvan Alderman, Jared Hoyle, Jack Fry, and Steve KeeleyDepartment of Horticulture, Forestry and Recreation ResourcesSummary. Application of quick-release nitrogen fertilizer increased buffalograss  divot recovery. A quick-release fertilizer at 1 lb N/1,000 ft2 resulted in 50% divot recovery 6.3 days quicker compared to the untreated control. Rationale. Buffalograss [Buchloe dactyloides (Nutt.) Engelm] is utilized as an accept-able turfgrass on golf courses due to its low input characteristics and its ability to survive under minimal irrigation. The slow growth of buffalograss creates concerns with recuperative capacity when damaged from normal golfing activities. Objectives. Determine if nitrogen sources and application rates influence the divot recovery potential of ‘Cody’ buffalograss. Study Description. Field studies were conducted at the Rocky Ford Turfgrass Research Center in Manhattan, Kansas, and the Council Grove Country Club in Council Grove, Kansas, from July through September 2014 on a ‘Cody’ buffalograss fairway (0.625 in. mowing height). Research study was a randomized complete block, with a 2 × 4 factorial treatment structure. Treatments consisted of two nitrogen  fertilizer sources and four fertilizer application rates. Fertilizer sources were a quick-release 46-0-0 (N-P-K) urea and a slow-release 43-0-0 (N-P-K) 120-day controlled release polymer-coated urea. Fertilizers were applied at 0, 1, 2, and 3 lb N/1,000 ft2. Quick-release nitrogen treatments were applied at two half-rate appli-cations at one and four weeks after initiation. Slow-release treatments were applied once at trial initiation. Divots were made using a modified lawn edger (Figure 1). Divot recovery was visually rated weekly on a 0% to 100% scale. Data were subjected Kansas State University  Agricultural Experiment Station  and Cooperative Extension Serviceto an analysis of variance using the Proc Mixed procedure in SAS (SAS Institute Inc., Cary, North Carolina). Data were analyzed using a three-parameter sigmoidal regres-sion model where parameter estimates equal 50% divot recovery. Results. All treatments achieved 100% recovery by trial termination, although it was observed that the recovery rates were different. Nitrogen application rates of 1, 2, and 3 lb N/1,000 ft2 (quick-release treatments) resulted in faster recovery rates than the control (Table 1). The 1 lb N/1,000 ft2 treatment of the quick-release product resulted in the quickest recovery rate of all treatments, reaching 50% divot recovery 6.3 days faster when compared to the untreated area. Recovery of all slow-release nitrogen treatments was no different from the control (Figure 2). Applications of nitrogen also increased buffalograss color and quality (data not shown).Table 1. Parameter estimates (± standard errors) from fitting Equation 1 to data for quick- and slow-release rates % recovery across all locations.†Source Rate a‡ b R50 Adj R2--§ 0lb N/1000ft2 99.51 ± 3.12 1.17 ± 0.12 3.40 ± 0.14 0.85Slow 1lb N/1000ft2 97.42 ± 4.96 1.17 ± 0.18 3.82 ± 0.21 0.85Slow 2lb N/1000ft2 99.18 ± 4.41 1.08 ± 0.18 3.30 ± 0.19 0.83Slow 3lb N/1000ft2 99.91 ± 2.89 0.97 ± 0.12 3.17 ± 0.12 0.90Quick 1lb N/1000ft2 99.48 ± 2.42 0.91 ± 0.12 2.50 ± 0.11 0.89Quick 2lb N/1000ft2 98.09 ± 3.15 0.91 ± 0.14 2.98 ± 0.14 0.86Quick 3lb N/1000ft2 99.64 ± 3.01 0.94 ± 0.14 2.66 ± 0.14 0.86† Sigmoid regression model defined by equation.‡ Abbreviations: a, maximum recovery; b, slope; R50, weeks after injury to achieve 50% recovery; Adj, adjusted.§ During this field study two untreated plots (Slow 0 lb N/1,000 ft2 and Quick 0 lb N/1000 ft2) were used to attain a randomized complete block design, with a 2 × 4 factorial treatment structure. For the purpose of nonlinear regression analysis, data from the two control treatments were combined and treated as one treatment.Kansas State University  Agricultural Experiment Station  and Cooperative Extension ServiceFigure 1. Divots were made using a modified lawn edger. The standard edger blade was removed and replaced with 13, 7.25 in carbide tip circular saw blades 0.079 in. thick. The modified lawn edger created a standardized divot (5.5 in. × 2.125 in. × 0.125 in.) in each plot.Kansas State University  Agricultural Experiment Station  and Cooperative Extension Service0 3.52 3 4Weeks after2.5* M = lb/1,000 ft2Eect of Nitrogen Source and Rate to Reach 50% Divot Recovery1 N M3 N M2 N M3 N M2 N M0 N M1 N M*Slow releaseQuick releaseFigure 2. Data presented in this table are the nonlinear regression parameter esti-mates to reach 50% divot recovery ± the standard error. Treatments are determined to be statistically different if the standard error boxes do not overlap.

Influence of Fertilizer Source and Rate on Buffalograss Divot Recovery

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Influence of Fertilizer Source and Rate on Buffalograss Divot Recovery

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